Work-clamping jaw.



0. ML STREBTER & J. B. HEOK.

' WORK GLAMPING JAW APPLICATION FILED JAN. 23, 1914.

1,125,207. Patented'Jan.19,1915. Fi 91.

l /I/IlIlIlI/I/A' WITNESSES: INVENTORS,

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cmmsfms'rnmpnn AND JOHN 13. neon, or rotnno, onto,

WORK-CLAAMPIN'G raw; 7

' S peciiicationof Letters Patent.

, Application filed January as; 1914. I Serial no. 813,863.

To all whom it may concern:

Be o n. hat. we, chime ,S'rnnn'rnu and J OHN BL'HEcK, citizens of theUnited States, and residents of Toledo, in

the county of'Luca's and State of Ohio, have invented a certain new anduseful Work- Clamping Jaw; and we" "do hereby declare the following tobe a full, "clear, and exact description of "the l-invention, such aswill enable others skilled in theart -towhich it appertainsto make'andusethe same, -reference beinghad to the accompanying drawing's, and tothc. characters 'of referencemarked thereon, which form a, part of thispnally 'of the. plate, preferably the fullspecificationi This inventionrelates particularly to workfijclamping means forv use-in connectionwitliplaning machines, gigs, and the like,

" also for use in connection with bench .vises,.b'ut is not restrictedto such uses as it may be employed in ,any connection for which it-maybe adapted or appropriate.

In shop work considerable difficulty has been experienced-in the use ofmachines off the class described due to the tendency of .work to creepup when: the holdin'g'jaws are. tightened thereagainshthus necessitatinga frequent pounding down of the work during the clamping "action.

The objectiof our invent on is to obviate this objectionable featureby'theprovision, in connection with work clamping jaws or v parts, ofsimple and efiicient meansfor caus 7. ng, or tendlng to cause, an inwardmovement of a work piece when being clamped.

The invention is fully described in :the

followingspecification, and while in its broader aspect, it is capableof. embodiment in numerous forms, a preferred embodiment thereof isillustrated in the accompanying drawings, in which',

I Figure 1, is an elevation of a machine table with a pair'- ofrelatively movable work clamping jaws equipped with our inventionassociated therewith and in work clamping position. Fig. 2 is a sectionthereof on the and Fig.3 is -.a vertical section of a face.

line :0, a: in Fig. 1 'with the work removed,

' plate of one of the jaws with thework gripping means thereof in normalposition, Referring to the drawings, 1 designates the table portion of amachine, or, it may comprise a-bench, and is provided at one side with afixed aw 2 and in opposition thereto with a movable jaw 3, which has itsecess 7,.thesprings l2 yielding movements toward and away from the jaw 2guided in any suitable manner, as-1s well Patented Jan. 19; 1 915.

understood in the art. The movements of the j aw 3 are actuated by theturning-ofjone or-more screws 4,- which are threaded into portions ofthe ja-w 3fand are rotatably anchored against longitudinal movements ina table part 5. I

. Each of the-jaws2 and faced with a removable plate 6, which is securedthereto by screws or in any other suitable manner.

length thereof, and disposed therein is a work clamping memberB. Thismember is of bar form and'is of less depth or thick- 7, and is of agreater width than the depth of the recess to permitvits outer edgetoproject beyond the outer face of the p ate 6 when its inner edge is incontact with the recess face, as shown. The inner and outer edges of themember 8 are beveled in the ness than the vertical width of the'recess'same direction so that the bar in cross-sec tion i's substantially intheform of a1 parallelogram with the point 9 at the inneredge thereofdisposed at its -top side with the point 10 at' the e g-er edge thereofdisposed'atvits lpwerside 5 shown.

. The work grlpping member "8 is yield- I I ingly held with itsupperls'ide in lflat contact withthe"top -wa1 1br thefrec'e'ss 7 by oneor 'more .spring-pressed' -p-lungers 11 which are mounted in deeortmere"sockets 7-12 in the bottom wall of the recess 7. A coiledcompression-spring 13' is mounted in the socket with the plunger andforoesthe plunger upward against the member 8. .The-

hole 14in the upper wall ofthe recess 7 registers withthe socket 12 andfacilitatesan insertioninto or removal of the plunger 11 and its springfrom the socket upon a j removal of the member 8. from itsjrecess.

pivotal contact of the point 10 of each memher 8 with the work below theplane of 'givbtal contact of the point 9 of each memer against the basewalls of the respective to permit 100' It is evident that theprovisionof a work means 'will tend to of the work which is so annoying in theuse.

of planing machines, gigs and other machinesiin :which a work-piece isclamped preparatory to planing or otherwise operating on, and obviatesthe necessity of frequently pounding the work down into place during theclamping action. This means also prevents the tendency of the work tocreep up during a running of the machine; I We wish it understood thatour invention is not limited to any specific construction or arrangementof the parts as the form shown is capable of numerous modifications andchanges without departing from the e spirit of the invention.

Having thus described our invention, -what we claim as new, and desireto secure by'lLetters Patent, is,- j x 1-. The combination with a worksupport and relatively adjustable vise jaws for work'clainping action ofthe aws to force clamping work over said support, said jaws havingrecessed faces, of angular pieces fulcrumed in said recesses and oerable by a the engaged work piece against the support. 2. Thecombinatlon with a work support and relatively adjustable jawsassociated therewith, said LjaWshaVing recessed faces,

of angular'work gripp ng pieces stepped said recesses forrockmgjmovements-relative to the jaws and operable by the application ofa clamping pressure to the jaws to clamp an inte it inward towa'ryieldingly actin pieces to norma y retain them in one posiosed workpiece and orce the support, and means on said work gripping tion oftheirroofing movements relative to the jaws.

3. The combination with a vise having a.

jected into said recess for transverse rocking movementsrelatiyethereto, saidmemher having opposing thrust edges which areofiset one from the other in the direction of rocking movements of themember relative to said part with one edge in contact with the clampingpart and with the'other edge adapted to have contact with a work pieceand to cooperate with, the clamping part to force an engaged work pieceagainst the support, and me'ansyieldmgly'retaining said member in oneposition of its rocking movement relative to said clamping part.

ing. parts capable of. relative clamping movements one toward the other,and a work support, of work 'pping members carried in opposed relationby said parts for transverse roe 11g movements relative thereto;v saidmembers. each-having inner The combination with a pair of clampi andouter thrust parts with the outer thrust parts -'otfset from the innerthrust parts thereof in the direetionot rocking movements of themembers: whereby to tend'to force a work piece, when: being clanipetilagainst the support, and means 'yieldinglyretainin each of saidmembersin one po=- sition- 0 ts rocg movements.

' In testimony whereofiwe'have hereunto signed our names "to thisspecification in the presence of two subscribin witnesses.

- CHARLES M. ST EETER.

- 'JGIHLN Witnesses:

' t1 W, Owns,

an Aun.

